Paper by Erik D. Demaine

We prove NP-hardness results for five of Nintendo's largest video game
franchises: Mario, Donkey Kong, Legend of Zelda, Metroid, and Pokémon.
Our results apply to generalized versions of Super Mario Bros. 1–3, The
Lost Levels, and Super Mario World; Donkey Kong Country 1–3; all Legend
of Zelda games; all Metroid games; and all Pokémon role-playing games.
In addition, we prove PSPACE-completeness of the Donkey Kong Country games and
several Legend of Zelda games.